Improving genome-wide mapping of nucleosomes in Trypanosome cruzi

Beati, Paula - Massimino Stepñick, Milena - Vilchez Larrea, Salomé C - Smircich, Pablo - Alonso, Guillermo D. - Ocampo, Josefina

Resumen:

In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain.


Detalles Bibliográficos
2023
Genomics
Nucleosomes
Nucleosome mapping
Trypanosoma cruzi
Sequence alignment
Chromatin
Haplotypes
Inglés
Universidad de la República
COLIBRI
https://hdl.handle.net/20.500.12008/43171
Acceso abierto
Licencia Creative Commons Atribución (CC - By 4.0)
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author Beati, Paula
author2 Massimino Stepñick, Milena
Vilchez Larrea, Salomé C
Smircich, Pablo
Alonso, Guillermo D.
Ocampo, Josefina
author2_role author
author
author
author
author
author_facet Beati, Paula
Massimino Stepñick, Milena
Vilchez Larrea, Salomé C
Smircich, Pablo
Alonso, Guillermo D.
Ocampo, Josefina
author_role author
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collection COLIBRI
dc.contributor.filiacion.none.fl_str_mv Beati Paula
Massimino Stepñick Milena
Vilchez Larrea Salomé C
Smircich Pablo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Biología.
Alonso Guillermo D.
Ocampo Josefina
dc.creator.none.fl_str_mv Beati, Paula
Massimino Stepñick, Milena
Vilchez Larrea, Salomé C
Smircich, Pablo
Alonso, Guillermo D.
Ocampo, Josefina
dc.date.accessioned.none.fl_str_mv 2024-03-19T12:15:22Z
dc.date.available.none.fl_str_mv 2024-03-19T12:15:22Z
dc.date.issued.none.fl_str_mv 2023
dc.description.abstract.none.fl_txt_mv In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain.
dc.format.extent.es.fl_str_mv 16 h.
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dc.identifier.citation.es.fl_str_mv Beati, P, Massimino Stepñick, M, Vilchez Larrea, S [y otros autores]. "Improving genome-wide mapping of nucleosomes in Trypanosome cruzi". Plos One. [en línea] 2023, 18(11): e0293809. 16 h. DOI: 10.1371/journal.pone.0293809.
dc.identifier.doi.none.fl_str_mv 10.1371/journal.pone.0293809
dc.identifier.issn.none.fl_str_mv 1932-6203
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/20.500.12008/43171
dc.language.iso.none.fl_str_mv en
eng
dc.publisher.es.fl_str_mv PLOS
dc.relation.ispartof.es.fl_str_mv Plos One, 2023, 18(11): e0293809.
dc.rights.license.none.fl_str_mv Licencia Creative Commons Atribución (CC - By 4.0)
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
dc.source.none.fl_str_mv reponame:COLIBRI
instname:Universidad de la República
instacron:Universidad de la República
dc.subject.es.fl_str_mv Genomics
Nucleosomes
Nucleosome mapping
Trypanosoma cruzi
Sequence alignment
Chromatin
Haplotypes
dc.title.none.fl_str_mv Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
dc.type.es.fl_str_mv Artículo
dc.type.none.fl_str_mv info:eu-repo/semantics/article
dc.type.version.none.fl_str_mv info:eu-repo/semantics/publishedVersion
description In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain.
eu_rights_str_mv openAccess
format article
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identifier_str_mv Beati, P, Massimino Stepñick, M, Vilchez Larrea, S [y otros autores]. "Improving genome-wide mapping of nucleosomes in Trypanosome cruzi". Plos One. [en línea] 2023, 18(11): e0293809. 16 h. DOI: 10.1371/journal.pone.0293809.
1932-6203
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repository.mail.fl_str_mv mabel.seroubian@seciu.edu.uy
repository.name.fl_str_mv COLIBRI - Universidad de la República
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rights_invalid_str_mv Licencia Creative Commons Atribución (CC - By 4.0)
spelling Beati PaulaMassimino Stepñick MilenaVilchez Larrea Salomé CSmircich Pablo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Biología.Alonso Guillermo D.Ocampo Josefina2024-03-19T12:15:22Z2024-03-19T12:15:22Z2023Beati, P, Massimino Stepñick, M, Vilchez Larrea, S [y otros autores]. "Improving genome-wide mapping of nucleosomes in Trypanosome cruzi". Plos One. [en línea] 2023, 18(11): e0293809. 16 h. DOI: 10.1371/journal.pone.0293809.1932-6203https://hdl.handle.net/20.500.12008/4317110.1371/journal.pone.0293809In Trypanosoma cruzi DNA is packaged into chromatin by octamers of histone proteins that form nucleosomes. Transcription of protein coding genes in trypanosomes is constitutive producing polycistronic units and gene expression is primarily regulated post-transcriptionally. However, chromatin organization influences DNA dependent processes. Hence, determining nucleosome position is of uppermost importance to understand the peculiarities found in trypanosomes. To map nucleosomes genome-wide in several organisms, digestion of chromatin with micrococcal nuclease followed by deep sequencing has been applied. Nonetheless, the special requirements for cell manipulation and the uniqueness of the chromatin organization in trypanosomes entails a customized analytical approach. In this work, we adjusted this broadly used method to the hybrid reference strain, CL Brener. Particularly, we implemented an exhaustive and thorough computational workflow to overcome the difficulties imposed by this complex genome. We tested the performance of two aligners, Bowtie2 and HISAT2, and discuss their advantages and caveats. Specifically, we highlight the relevance of using the whole genome as a reference instead of the commonly used Esmeraldo-like haplotype to avoid spurious alignments. Additionally, we show that using the whole genome refines the average nucleosome representation, but also the quality of mapping for every region represented. Moreover, we show that the average nucleosome organization around trans-splicing acceptor site described before, is not just an average since the same chromatin pattern is detected for most of the represented regions. In addition, we extended the study to a non-hybrid strain applying the experimental and analytical approach to SylvioX10 strain. Furthermore, we provide a source code for the construction of 2D plots and heatmaps which are easy to adapt to any T. cruzi strain.Submitted by Pintos Natalia (nataliapintosmvd@gmail.com) on 2024-03-18T18:22:50Z No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.1371.journal.pone.0293809.pdf: 2122127 bytes, checksum: 90df1092777713be2814132ec35cf3e5 (MD5)Approved for entry into archive by Faget Cecilia (lfaget@fcien.edu.uy) on 2024-03-19T11:59:07Z (GMT) No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.1371.journal.pone.0293809.pdf: 2122127 bytes, checksum: 90df1092777713be2814132ec35cf3e5 (MD5)Made available in DSpace by Luna Fabiana (fabiana.luna@seciu.edu.uy) on 2024-03-19T12:15:22Z (GMT). No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.1371.journal.pone.0293809.pdf: 2122127 bytes, checksum: 90df1092777713be2814132ec35cf3e5 (MD5) Previous issue date: 202316 h.application/pdfenengPLOSPlos One, 2023, 18(11): e0293809.Las obras depositadas en el Repositorio se rigen por la Ordenanza de los Derechos de la Propiedad Intelectual de la Universidad de la República.(Res. Nº 91 de C.D.C. de 8/III/1994 – D.O. 7/IV/1994) y por la Ordenanza del Repositorio Abierto de la Universidad de la República (Res. Nº 16 de C.D.C. de 07/10/2014)info:eu-repo/semantics/openAccessLicencia Creative Commons Atribución (CC - By 4.0)GenomicsNucleosomesNucleosome mappingTrypanosoma cruziSequence alignmentChromatinHaplotypesImproving genome-wide mapping of nucleosomes in Trypanosome cruziArtículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionreponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaBeati, PaulaMassimino Stepñick, MilenaVilchez Larrea, Salomé CSmircich, PabloAlonso, Guillermo D.Ocampo, JosefinaLICENSElicense.txtlicense.txttext/plain; charset=utf-84267http://localhost:8080/xmlui/bitstream/20.500.12008/43171/5/license.txt6429389a7df7277b72b7924fdc7d47a9MD55CC-LICENSElicense_urllicense_urltext/plain; charset=utf-844http://localhost:8080/xmlui/bitstream/20.500.12008/43171/2/license_urla0ebbeafb9d2ec7cbb19d7137ebc392cMD52license_textlicense_texttext/html; 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- Universidad de la Repúblicafalse
spellingShingle Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
Beati, Paula
Genomics
Nucleosomes
Nucleosome mapping
Trypanosoma cruzi
Sequence alignment
Chromatin
Haplotypes
status_str publishedVersion
title Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
title_full Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
title_fullStr Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
title_full_unstemmed Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
title_short Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
title_sort Improving genome-wide mapping of nucleosomes in Trypanosome cruzi
topic Genomics
Nucleosomes
Nucleosome mapping
Trypanosoma cruzi
Sequence alignment
Chromatin
Haplotypes
url https://hdl.handle.net/20.500.12008/43171